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大家来看看我的动态sql 语句有什么问题？
dec{2} ldec_max,ldec_min,ldec_averate//最高分、最低分、平均分
string sqlstatement
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname=:+condition2
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :ldec_max,:ldec_min,:ldec_averate;
close my_cursor;
sle_max.text = string( ldec_max )
sle_min.text = string( ldec_min )
sle_aver.text= string(ldec_averate)
sqlstatement=" select count(*) from stu_score where stu_score.class_name=:"+condition2
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :renshu;
close my_cursor;
sle_renshu.text= string(renshu)
其中condition2为一字符串全局变量，是指具体的班级名称，
string sqlstatement
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname=:+condition2
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :ldec_max,:ldec_min,:ldec_averate;
close my_cursor;
sle_max.text = string( ldec_max )
sle_min.text = string( ldec_min )
sle_aver.text= string(ldec_averate)
sqlstatement=" select count(*) from stu_score where stu_score.class_name=:"+condition2
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :renshu;
close my_cursor;
sle_renshu.text= string(renshu)
其中condition2为一字符串全局变量，是指具体的班级名称，
...全文
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wangmin_yjitx 2003-05-13
谢谢大家，结贴
wangmin_yjitx 2003-05-13
问题终于解决了，原来应该这样：dec{2} ldec_max,ldec_min,ldec_averate//最高分、最低分、平均分
string sqlstatement
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname=？”
prepare sqlsa from :sqlstatement;
open dynamic my_cursor using :condition2;
fetch my_cursor into :ldec_max,:ldec_min,:ldec_averate;
close my_cursor;
sle_max.text = string( ldec_max )
sle_min.text = string( ldec_min )
sle_aver.text= string(ldec_averate)
string sqlstatement
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname=？”
prepare sqlsa from :sqlstatement;
open dynamic my_cursor using :condition2;
fetch my_cursor into :ldec_max,:ldec_min,:ldec_averate;
close my_cursor;
sle_max.text = string( ldec_max )
sle_min.text = string( ldec_min )
sle_aver.text= string(ldec_averate)
888888888888 2003-05-11
？？？
wangmin_yjitx 2003-05-11
但为什么ls_kemu不需要加单引号，它也是变量啊？
juwuyi 2003-05-11
dec{2} ldec_max,ldec_min,ldec_averate//最高分、最低分、平均分
string sqlstatement
//******************************************
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname=:+condition2
/*以上应该改为：
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname='"+condition2+"'"
*/
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :ldec_max,:ldec_min,:ldec_averate;
close my_cursor;
sle_max.text = string( ldec_max )
sle_min.text = string( ldec_min )
sle_aver.text= string(ldec_averate)
//******************************************
sqlstatement=" select count(*) from stu_score where stu_score.class_name=:"+condition2
/*以上应该改为：
sqlstatement=" select count(*) from stu_score where stu_score.classname='"+condition2+"'"
*/
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :renshu;
close my_cursor;
sle_renshu.text= string(renshu)
其中condition2为一字符串全局变量，是指具体的班级名称，
string sqlstatement
//******************************************
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname=:+condition2
/*以上应该改为：
sqlstatement = "select max(" + ls_kemu + ")， min("+ls_kemu+")， aver("+ls_kemu+") from stu_score where classname='"+condition2+"'"
*/
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :ldec_max,:ldec_min,:ldec_averate;
close my_cursor;
sle_max.text = string( ldec_max )
sle_min.text = string( ldec_min )
sle_aver.text= string(ldec_averate)
//******************************************
sqlstatement=" select count(*) from stu_score where stu_score.class_name=:"+condition2
/*以上应该改为：
sqlstatement=" select count(*) from stu_score where stu_score.classname='"+condition2+"'"
*/
prepare sqlsa from :sqlstatement;
open dynamic my_cursor;
fetch my_cursor into :renshu;
close my_cursor;
sle_renshu.text= string(renshu)
其中condition2为一字符串全局变量，是指具体的班级名称，
xirumin 2003-05-11
condition2是变量，而你想取的是condition2的内容，而不是'condition2'这一串
wangmin_yjitx 2003-05-11
我去看看， 不过 condition2已经是字符串，为什么还要加单引号
wangmin_yjitx 2003-05-11
我已改了，但还是不行，结果还是全部是0
yl_yz 2003-05-10
楼上说的对，你没写
declare my_cursor dynamic cursor for sqlsa;
还有
sqlstatement=" ...where stu_score.class_name='"+condition2+"'"
declare my_cursor dynamic cursor for sqlsa;
还有
sqlstatement=" ...where stu_score.class_name='"+condition2+"'"
xirumin 2003-05-10
一时看不出有什么毛病，写没写类似的语句
declare my_cursor dynamic cursor for sqlsa;
declare my_cursor dynamic cursor for sqlsa;
wangmin_yjitx 2003-05-09
ls_kemu也是一字符串变量，代表的字段名。
wangmin_yjitx 2003-05-08
up
wangmin_yjitx 2003-05-08
结果都是0，我查看数据库，符合条件的记录都有。
xjbs 2003-05-08
出什么错？
基于java的企业人事管理系统设计--软件工程课程设计（含源码与论文设计）.rar 1 引言 4
1.1 课程设计目标 4
1.2 编程工具（编程环境）介绍 4
1.3 实施时间及主要实施步骤 4
2 需求分析 5
3 系统总体设计 6
4 数据库设计 6
5 主要功能模块的设计与实现 10
5.1 功能模块1详细设计（综合查询员工信息）..........................................................10
5.1.1 详细设计.......................................................................................................10
5.1.2 算法流程........................................................................................................15
5.1.3 界面设计及测试结果.....................................................................................15
6 调试分析 15
7 用户手册 16
8 测试结果 17
8.1 员工信息的添加...................................................................................................17
8.2 员工信息的修改...................................................................................................17
8.3 员工信息的删除...................................................................................................18
8.4 员工信息的综合查询...........................................................................................18
8.5 员工信息按性别统计的结果................................................................................19
8.6 员工信息按状态统计的结果...............................................................................19
8.7 员工信息按职称统计的结果................................................................................20
9 结论 20
10 参考文献 20
